SoundBot SB220 Bluetooth Headset Wireless Stereo Headphone for Music Streaming & HandsFree - Black Stereo Bluetooth headset with back-hang style Foldable design provides maximum portability Features Software & CVC echo/noise reduction for reducing noise Wirelessly enjoy stereo music from all A2DP-enabled devices, such mobile phones, PDA, PC etc. Switch automatically from remote controls on the headset allow you to play, The latest version of A2DP1.2 and AVRCP1.0 profiles support Supports Bluetooth Headset and Hands-free Profile(HFP 1.5) RF Frequency Range: 2.402-2.480GHZ, 2.4G ISM band Radio Performance: Receive Sensitivity of -90dBm, TX Power Max 4dBm Frequency Response: 20 Hz - 20 KHz, Very high Signal to Noise Ratio (SNR):95 Db, Total